Do you have a topic that is an immediate deal breaker if a manga series you were already reading suddenly featured that topic, such that you would stop reading the series (even if it was "tastefully" done)? For example: religion, rape, etc.

Allelujah confesses his love to Lockon. Lockon has never before been in a relationship where love is involved so even though he agrees to go out with Allelujah he isn't really sure what all that involves.